MICROWAVE INVERSE SCATTERING - LOCAL SHAPE FUNCTION IMAGING FOR IMPROVED RESOLUTION OF STRONG SCATTERERS

Local shape function imaging uses far-field microwave scattering data to reconstruct the presence or absence of small metal cylinders throug hout space, in order to model arbitrary metallic objects. The reconstr ucted images represent the scattering amplitude at discrete locations in space with multiple scattering effects incorporated. Super-resoluti on is demonstrated for monochromatic image reconstructions. Even bette r reconstructions are obtained with multiple frequency data. The speed of computation is increased with a fast forward solver algorithm. Als o, measured data is used in the local shape function imaging algorithm and the resolution is improved over diffraction tomography.